It is highly unlikely the UK will negotiate its complete exit of Europe within a two-year timeframe once it triggers Article 50, which formally begins its exit from the EU.

If no trade deals are agreed, the UK and Europe will potentially fall back on World Trade Organisation (WTO) trade agreements which include trade tariffs of up to 60pc and 50pc on Irish beef and dairy exports.

Agriculture Minister Michael Creed has insisted the Government was fully committed to seeking a negotiated settlement between the EU and UK on Brexit, which would provide for continued unfettered access to the UK market, without tariffs and with minimal additional customs and administrative procedures.

However, both jurisdictions may have to apply the WTO tariff rates to their imports.

One expert in this area, Alan Matthews - who is Professor Emeritus of European Agricultural Policy - explained that we knew what UK exports to the EU would face if there was no trade deal. But he added that it was unclear what tariffs the UK might impose on Irish or EU exports to the UK.

Mr Matthews said no one knew what rate of tariffs the UK might apply to food imports.

It would be a "worst-case scenario" if the UK applied 60pc and 50pc tariffs, which were the maximum WTO tariffs it could apply.